Buried-interface stabilization for efficient and bright blue perovskite LEDs
Xin-Mei Hu1, Yang Shen2,3, Shi-Chi Feng4
1School of Physics, East China Normal University, Shanghai, China.
Nature Communications
|June 15, 2026
Summary
Researchers developed a protective network for blue perovskite light-emitting diodes (PeLEDs), significantly improving their efficiency and stability by preventing interface degradation.
Area of Science:
- Materials Science
- Optoelectronics
- Nanotechnology
Background:
- Metal halide perovskites show promise for light-emitting applications.
- High-performance blue perovskite light-emitting diodes (PeLEDs) are hindered by degradation at buried interfaces.
Purpose of the Study:
- To enhance the performance and stability of blue PeLEDs.
- To address the challenge of buried interface degradation in PeLEDs.
Main Methods:
- A 3D cross-linked network of pentaerythritol tetraacrylate was constructed on the hole transport layer (HTL).
- This network acts as a physical barrier and passivates interfacial defects through coordination interactions.
Main Results:
- The cross-linked network protected the HTL from solvent erosion, preserving structural integrity.
- Interfacial dipole formation improved energy level alignment and hole injection efficiency.
- Blue PeLEDs achieved high external quantum efficiencies (EQEs) up to 28.0% at 488 nm and high luminance.
Conclusions:
- The developed cross-linked network effectively stabilizes buried interfaces in blue PeLEDs.
- This approach significantly boosts the efficiency and brightness of blue PeLEDs, overcoming previous limitations.
